Chapi p. t^ry<M///?0/BODIES. $7 



upon the body : and in gencnll, that the manner of any thing 

 ean'work upon that thing whofe manner it is. For Ariftotlc 

 and Saint Thomas, and their intelligent commentatours, decla- 

 ring the notion of jQ*4//>j, tell us, that to be a Quality is no- 

 thing elfe but to be the determination or modification of the 

 tiling whofe quality it is. 



Befidesjthat the naturall manner of operation is, to work ac- 

 cording to the capacity of the fubje.fr, : but when a body is in the 

 midft ofan uniform medium or fpace, the fubje& is equally pro- 

 pared on all fides to receive the action of that body. Where- 

 fore (though we ihould allow it a force to move) if it be a na- 

 tural! Agent, and have no understanding, ic mutt work indiffe- 

 rently on all fides, and by confequence, cannot move on any 

 fide. For if you fay that the Agent in this cafe (where the me- 

 dium \s uniform ) worketh rather upon on fide then upon ano- 

 ther; it mult be becaufe this determination is within the Agent 

 it felf, and not out ofthecircumftantdjfpofidons : which is the 

 manncf of working of thole f ibftances that work for an end of 

 their own that is, of underftanding creaturcs,and not of natu- 

 rall bodies. 



Now he that would exactly determine what motion a body 9* 

 hath, or is apt to have; determining by fuppofition the force of ^odonTaU 

 the Agent, muft calculate the proportions of all thefc three con- wayes made in 

 ditions of the moveable, and the quality of the medium: which 

 is a proceeding too particular for the intention of our difcourfe. numbers. 

 Buttofpeak in common, it will not be amiflfe to examine in 

 what proportion, motion doth increafe ; fince we have con- 

 cluded that all motion proccedeth from quiet by a continuall 

 encrea/e. Galilcus (that miracle of our age, and whole wit 

 was able to dilcover whatfbeverhe had a mind to employ it 

 about ) hath told us that naturall motion encreifeth in the pro- 

 portion of the odde numbers. Which to cxprefle by example, i 

 thusrfuppofe that in the going of the firrt yard it hath one degree 

 of velocity,then in the going ofthefecondyard it will have three 

 degrees, and in going of the third ic will have five : and fb 

 onwaids, ftill adding two to the degrees of the velocity for eve- 

 ry one, to the fpace. Or to cxprelVe it more plainly; if in the 

 firft minute of time it goeth one yard of fpace, then in the next 

 minute it will go three yards, jn the third it will go fivc.in the 

 fourth feaven, and fo forth. F 4 But 



